A-TECH silver osp pcb free delivery at discount

Company Advantages
1. From the materials to designs, A-TECH carbon ink pcb is totally guaranteed by our professional expertise.
2. The product is designed with great electromagnetic compatibility. The insulated housing functions to reduce electromagnetic disturbance to a certain level.
3. The product not only plays an important role in sealing medium but also it can keep the contaminants from polluting the medium.
4. Being engaged in offering high-end osp pcb , A-TECH enjoys a high reputation among customers.

Immersion Tin, or Chemical Tin, it’s a RoHS Compliant metallic finish deposited by a chemical displacement reaction that is applied directly over the basis metal of the circuit board, the immersion Tin protects the underlying copper from oxidation over it’s intended shelf life, copper and tin however have a strong affinity for one another, the diffusion of one metal into the other will occur inevitably, directly impacting the shelf life of the deposit and the performance of the finish. The negative effects of tin whiskers growth are well described in industry related literature and topics of several published papers.

The typical thickness of Immersion Tin is ≥1.0UM and the shelf life is 6 months. The cost of Immersion Tin is more expensive than HASL but less expensive than Immersion Gold and close to Immersion Silver. Similar to Immersion Silver, Immersion Tin is also sensitive in handling and storage, it requires PCB manufacturers to control and pack PCBs with Imm Tin more carefully.

The advantages of Immersion Tin

● Excellent flatness
● Mid range cost for lead free finish
● Good for fine pitch / BGA / smaller components
● Top choice for press fit technology
● Reworkable

The disadvantages of Immersion Tin

● Very sensitive to handling – gloves must be used
● Exposed Tin on final assembly can corrode
● Not good for multiple reflow/assembly processes
● Aggressive to soldermask – soldermask dam should be more than 5mil
● Baking prior to use can have a negative effect

A-TECH is capable of using Immersion Tin, we make the profile and electrical test before the process of Immersion Tin finish, and we use papers to separate each piece of boards to avoid scratches during package and transportation.

Company Features
1. A-TECH CIRCUITS Co., Ltd. is an internationally renowned leading company dedicated to osp pcb production.
2. Since the establishment, we have set up a reasonable quality control system. This system allows us to timely give feedback on the quality of products, and prevent possible deficiencies and failures in advance.
3. By coporating with our clients to put sustainability into practice, we are reinforcing our commitment to sustainable development for the long run. We are committed to keeping on the stable business relationships with our customers. We are always willing to work with them side by side, and strengthen our communication on business. We treat every customer as a long-term partner. Their interest and needs are our foremost priority. We will provide them with the best to gain maximum satisfaction. Check it! We always act responsibly, develop operations and are in continuous contact with our customers and partners. It is important that our customers can always rely on our products and services. Check it!